How many times can pleural effusion in a baby be drained?

As many as needed. As many times as needed until correction of the causative process can be addressed. Question is too inespecific to give context to a more thorough explanation and answer.
No limit. Generally, no limit on "how many times". However, the more times someone undergoes an invasive procedure the greater risk of complications. Key to preventing recurrence is answering "why the baby developed an effusion? ". Then treat the primary cause. Be well.

Related Questions

Can you let me know how many times can pleural effusion be drained?

Many. But better to get it fully drained once, and the cause identified and treated to prevent the recurrence. Some cannot be stopped, but can be internally drained with devices.
As many as..., but. Draining effusion is a part of symptomatic care, which may be done as many/often as clinically needed, but comes with increasing complications such as infection, pain, etc. Due to its often related-with chronically debilitating illnesses in attesting life is a one-way street of accumulation, modification, & continuation. So, ask more concerns or issues with the treating doctors.

How many times can pleural effusion be drained without coming back?

Depends. Mainly on why you got it. An effusion from cancer or heart failure isn't going to go away permanently.
No limit. Generally, no limit on "how many times". However, the more times someone undergoes an invasive procedure the greater risk of complications. Key to preventing recurrence is answering "why did you get the effusion? ". Then treat the primary cause. Be well.

Does pleural effusion of 600ml post CABG need to be drained?

Work with doc to... Ask and work closely with the treating doctor so to find out what is the underlying cause for pleural effusion, assess its clinical implication, and decide which form of care is needed.

Pleural effusion in a pt with lung cancer. Do you drain it?

Absolutely. Two reasons to drain it are for diagnosis, are there cancer cells in the effusion, this is bad. Bumps you up to stage 4. Two, therapeutically it will be easier to breathe if the effusion is removed.
Yes. The fluid should be drained to alleviate shortness of breath. A pleurodesis can be performed to prevent the fluid from coming back. This can be done using minimally invasive surgery or thoracoscopy.
Only if symptomatic. High likelihood for recurrence so only if severe short of breath.